living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Mollusca Linnaeus, 1758 - molluscs
           Class Gastropoda Cuvier, 1795 - snails and slugs
             Subclass Pulmonata Cuvier, 1814 - land snails and slugs see Order Pulmonata Cuvier, 1814
               ?Order Systellommatophora Pilsbry, 1948 see Suborder Systellommatophora Pilsbry, 1948
                 Superfamily Oncidiacea see Superfamily Onchidiacea
                   Family Oncidiidae see Family Onchidiidae Rafinesque, 1815
                     1 Genus Onchidium Buchanan, 1800
                     2 Genus Onchidella Gray, 1850